Warp machine



P. SCHGNFELD ETAL 2,306,906

Dec. 29, 1942.

WARP MACHINE Filed July 12, 1940 ml: fi 7 3 7a art 0W v P U ScHbNFELD Aum- BART/{EL Patented Dec. 29 1942 WARP MACHINE Paul Schiin feld, Chemnitz, and re Barthel, Mittelbach, near Chemnitz, Germany; vested in the Alien Property Custodian Application July 12, 1940, Serial'No. 345,066 In Germany May 5, 1939 2 Claims. (Cl. 66-86) This invention relates to'a warp machine.

In warp machines, in which between the lapping machines or plates and the pattern mechanisms, as wheels, chains, etc., providing for their longitudinal adjustment slides are interposed, the lapping plates are drawn toward the slides by springs and the slides pressed against the pattern mechanism. Increased speed of the warp machines requires a corresponding increase in the strength of the springs so as to enable them to keep the lapping plates always in engagement with their respective slides.

This arrangement involves a severe drawback in view of the fact that the lapping plates have to carry out both longitudinal and transverse motions, and, as the plate end abutting against the slide glides along the latter during the swinging motion of the plates, the friction developed depends upon the strength of the springs. In high-speed machines these springs are therefore so strong that the plate end abutting against the slide during motion of the plate is prevented by great friction from moving at the same rate as the rest of the plate and lags somewhat behind, which finds expression in a deflection of the plates with the result that the guides are displaced relative to the needles and threads may be cut, particularly in fine-gauge machines.

It is the object of the invention to overcome this drawback in machines of this class by causduring their motion, whereby the hitherto unavoidable frictional resistance at the point of contact of the slides and plates during motion of the latter as Well as the deflections of the plates with all the consequences resulting therefrom are eliminated and a well-known defect is cured. The fact that the slides are laterally moved relative to, say, the driving levers of the attern mechanism during motion of the lapping plates is' immaterial, since the slides and the driving levers may be made so strong that lateral deflections can be disregarded. Furthermore, as the slides are substantially encased in a box, they are protected against any deflection.

It has been proposed to remove the slides from between the lapping plates and the pattern mechanism and to provide for direct action of the pattern mechanism upon the plates. Although such an arrangement would attain the object of the invention, it is nevertheless open to the objection that the pattern mechanism would have to cooperate in the swinging motions of the plate, which is impossible if the pattern wheels or chain discs have the normal circumference and large weight. w

It has further been proposed to replace the slides between the lapping plates and the pattern mechanisms by link-like rods which aline themselves obliquely to-the plates during the motion of the latter. It need hardly be pointed out that this construction cannot satisfactorily overcome the drawback mentioned, since the inclination of these rods during motion of the lapping plates will practically bring about the same dmelences in length that are caused by deflection, because .adjusted by means of one'of the usual pattern mechanisms comprising a wheel, chain gear, etc. of which only the upper member of a toggle lever 2 is shown upon which the wheel, etc. acts.

Between the toggle 2 and the plate I a slide 3 is interposed which is longitudinally displaceably disposed in a box 4. According to themventioh, the box 4 cooperates in the transverse motions of the plate I. Assumed that transverse motions are imparted to the plate I through the medium of a shaft 5, the arrangement may be such that the box 4 is secured to the shaft 5 by means of a support I I which is firmly connected to the shaft 5. To keep the plate I in constant engagement with the slide 3 a spring may be used in the usual manner for drawing one end of the plate I toward the slide 3 and the latter against the toggle Z, or the plate I may be positively connected with the slide 3 as shown. The inner end of the slide 3 has a seat 6 for the reception of a member I of the plate I, and a set screw 8 serves for eliminating harmful play. For pressing the slide 3 against the toggle 2 a spring 9 is provided on the outer end of the slide 3 between the box 4 and the slide plate Ill. When the plate I is moved by the needles, it does not perform any transverse motions relative to the slide 3 which, however, does carry out such motions relative to the pattern mechanism or the toggle 2. At the point of contact between the plate III and the stop screw, not shown, of the toggle 2 these transverse motions are unable to produce the trouble which the invention aims to eliminate.

Although only one lapping plate I, one slide 3 and a single pattern toggle 2 are shown, the invention is not restricted to this example but covers also machines having more than one lapping plate and the necessary longitudinal adjusting means.

What is claimed is:

1. In a warp machine having a lapping late which is movable longitudinally and transversely, a horizontal transversely movable shaft, means connecting said shaft with said lapping plate for her with said shaft to cause said supporting memher and the slide carried thereby to participate I in said transverse movement.

2. In a warp machine having a lapping plate which is movable longitudinally and transversely, a horizontal transversely movable shaft, means connecting said. shaft with said lapping plate for imparting the transverse movement, to said plate, a pattern mechanism, and a slide interposed between said pattern mechanism and said lapping plate; means positively connecting said slide with said lapping plate, a supporting mem-' ber carrying said slide. said slide having a plate,

a compression spring disposed on the end of the slide facing the pattern mechanism and engaging the slide plate and the supporting member. whereby said slide is actuated by said pattern mechanism for imparting the longitudinal movement to said lapping plate, and means connecting said supporting member with said shaft to cause said supporting member and the slide carried thereby to participate in said transverse movement.

PAUL SCHCNFELD. 

